I agree that it does not matter for sake of argument, as we have our salvation.
However there are several things that had to be fulfilled Biblically and here is one explanation that says it can only be 31 AD.
http://www.4angelspublications.com/Books/GCC/Chapter%205.pdf
It sounds to me like the High Sabbath is the day AFTER Passover, which agrees with the suggestion that Jesus was crucified on Thursday, 2 Sabbaths passed, then the women went to the tomb. However, that link suggest that "Seventh-day Adventists are the only ones who believe and teach that Jesus Christ was crucified in A.D. 31". WOW! Now you've scared me! I'll come back to it later, but right now I'm too startled to think coherently.